鞋码转换器

// 用于电子商务平台的尺码转换函数
function convertShoeSize(sourceSize, sourceSystem, targetSystem, gender) {
  // 不同性别和系统的查找表
  const conversionTables = {
    men: {
      us: [6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12],
      uk: [5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5],
      eu: [39, 39.5, 40, 41, 41.5, 42, 42.5, 43, 44, 44.5, 45, 45.5, 46],
      jp: [24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, 30]
    },
    women: {
      us: [5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11],
      uk: [3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9],
      eu: [35, 36, 36.5, 37, 38, 38.5, 39, 40, 40.5, 41, 42, 42.5, 43],
      jp: [21.5, 22, 22.5, 23, 23.5, 24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5]
    }
  };
  
  // 查找源系统中的索引
  const sourceIndex = conversionTables[gender][sourceSystem].findIndex(
    size => Math.abs(size - sourceSize) < 0.1
  );
  
  if (sourceIndex === -1) return null; // 找不到尺码
  
  // 返回目标系统中的对应尺码
  return conversionTables[gender][targetSystem][sourceIndex];
}

// 示例：将美国男士尺码 9 转换为欧洲尺码
const euSize = convertShoeSize(9, 'us', 'eu', 'men');
console.log(`美国男士尺码 9 等于欧洲尺码 ${euSize}`); // 输出：美国男士尺码 9 等于欧洲尺码 42.5

def convert_shoe_size(source_size, source_system, target_system, gender):
    """
    在不同系统之间转换鞋码，基于性别。
    
    参数：
        source_size (float): 原始鞋码
        source_system (str): 原始系统 ('us', 'uk', 'eu', 'jp')
        target_system (str): 目标系统 ('us', 'uk', 'eu', 'jp')
        gender (str): 'men', 'women' 或 'children'
        
    返回：
        float: 转换后的鞋码，如果转换不可能则返回 None
    """
    # 转换表
    conversion_tables = {
        'men': {
            'us': [6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12],
            'uk': [5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5],
            'eu': [39, 39.5, 40, 41, 41.5, 42, 42.5, 43, 44, 44.5, 45, 45.5, 46],
            'jp': [24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, 30]
        },
        'women': {
            'us': [5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11],
            'uk': [3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9],
            'eu': [35, 36, 36.5, 37, 38, 38.5, 39, 40, 40.5, 41, 42, 42.5, 43],
            'jp': [21.5, 22, 22.5, 23, 23.5, 24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5]
        }
    }
    
    # 查找源系统中的最近匹配
    try:
        source_sizes = conversion_tables[gender][source_system]
        closest_index = min(range(len(source_sizes)), 
                           key=lambda i: abs(source_sizes[i] - source_size))
        
        # 返回目标系统中的对应尺码
        return conversion_tables[gender][target_system][closest_index]
    except (KeyError, ValueError):
        return None

# 示例用法
eu_size = convert_shoe_size(9, 'us', 'eu', 'men')
print(f"美国男士尺码 9 等于欧洲尺码 {eu_size}")  # 输出：美国男士尺码 9 等于欧洲尺码 42.5

public class ShoeSizeConverter {
    // 男士鞋子的转换表
    private static final double[] US_MEN = {6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12};
    private static final double[] UK_MEN = {5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5};
    private static final double[] EU_MEN = {39, 39.5, 40, 41, 41.5, 42, 42.5, 43, 44, 44.5, 45, 45.5, 46};
    private static final double[] JP_MEN = {24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5, 30};
    
    /**
     * 生成制造的多系统尺码标签
     * @param baseSize 制造商系统中的基础尺码
     * @param baseSystem 制造商的尺码系统
     * @return 包含所有主要系统尺码的字符串
     */
    public static String generateSizeLabel(double baseSize, String baseSystem) {
        String gender = "men"; // 在这个示例中，假设为男士鞋
        
        double usSize = convertSize(baseSize, baseSystem, "us", gender);
        double ukSize = convertSize(baseSize, baseSystem, "uk", gender);
        double euSize = convertSize(baseSize, baseSystem, "eu", gender);
        double jpSize = convertSize(baseSize, baseSystem, "jp", gender);
        
        return String.format("美国: %.1f | 英国: %.1f | 欧洲: %.1f | 日本: %.1f", 
                            usSize, ukSize, euSize, jpSize);
    }
    
    private static double convertSize(double size, String fromSystem, String toSystem, String gender) {
        // 实现将使用类似于之前示例的查找表
        // 为简洁起见省略
        return 0.0; // 占位符
    }
    
    public static void main(String[] args) {
        String label = generateSizeLabel(42, "eu");
        System.out.println("尺码标签: " + label);
    }
}

1. 将一张纸放在墙边
2. 站在纸上，脚跟紧贴墙壁
3. 标记最长脚趾的位置
4. 测量墙壁到标记的距离，单位为毫米
5. 使用这个测量值查找任何系统中的尺码

// C 函数将脚长转换为蒙多点
int footLengthToMondopoint(double lengthMm) {
    // 蒙多点是脚长的毫米数，四舍五入到最近的 5 毫米
    return 5 * (int)((lengthMm + 2.5) / 5.0);
}

// 示例用法
int mondopoint = footLengthToMondopoint(267.8);
printf("脚长 267.8 毫米 = 蒙多点 %d\n", mondopoint); // 输出：蒙多点 270

public enum ShoeWidth
{
    Narrow, // AA, A
    Regular, // B, C, D
    Wide, // E, EE
    ExtraWide // EEE+
}

public class ShoeSizeWithWidth
{
    public double Size { get; set; }
    public string System { get; set; }
    public ShoeWidth Width { get; set; }
    
    public override string ToString()
    {
        string widthLabel = Width switch
        {
            ShoeWidth.Narrow => "窄",
            ShoeWidth.Regular => "标准",
            ShoeWidth.Wide => "宽",
            ShoeWidth.ExtraWide => "超宽",
            _ => ""
        };
        
        return $"尺码: {Size} {System}, 宽度: {widthLabel}";
    }
}